Seiko Cal. 5621 - 901

The Seiko 5621-901 represents an important milestone in Seiko's 1979 lineup. Powered by the 5621 caliber with 18j jewels beating at 21,600 bph, it delivers a 47 hours power reserve. [seikata-wm-7af238924d92]

Also known as: Helmet, UFO

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

13.8mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

18j

Frequency

21,600 bph

Power Reserve

47 hours

Year

1979

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